Submerged pumping unit



April 12 1927. 1,624,423

M. L. MILTON SUBMERGEDPUMPING UNIT Filegi May 14, 1926 2 Sheets-Sheet 1 1 624,423 Apnl 12 1927' M. L. MILTON SUBMERGED PUMPING UNI T Fil ed May 14, 1926 {sheets-sheet Zlwwntoz MLJIiZion,

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Patented Apr. 12, 1927.

I UNITED STATES 1,624,423 PATENT OFFICE.

MELVIN L. HILTON, 01? DENVER, COLORADO.

SUBMERGED PUMPING UNIT.

Application filed Kay 14,

improvements in well pumping a aratus and more particularly to a su merged pumping unit for use in such apparatus, the primary object of the invention being to provide an improved unit of this character capable of being suspended within the well on the usual well tubing and which is adapted to be removed together with said well tubing, thus simplifying the operation and method of repair of said unit.

A further object of the invention resides in providing a pumping unit which is so constructed as to eliminate the usual heavy pumping machinery at the head of the well,

thereby providing a simpler and much less complicated device than at present in use.

Another object of the invention resides in the provision of a device which will eliminate the use of sucker and pull rods, which are usually required in apparatus of this character and which are known to be a source of considerable trouble and expense.

Still another object of this invention resides in providing a pump unit which is adapted to elevate the fluid from the depths of the well in a continuousstream by the use of two positive-acting cylinders and a further object resides in constructing the device in a manner enabling the use of electricity as a source of power.

'A still further object resides in providing a device of this character which is comparatively simple and durable in construction, inex ensive to manufacture and one which wi be very eflicient and useful in operation.

With these and numerous other objects in view, my invention consists in the novel features of construction, combination and arrangement of parts as will be hereinafter referred to and more particularly pointed out in the specification and claims.

In the accompanying drawings, forming a art of this applicationi'gure 1 is a front elevation of my improved pumping unit removed,

Figure 2 is a side elevation thereof cons nected with the well tubing and shown in place within a well, the ground surrounding said well being shown in section,

Figure 3 is an enlarged vertical section through the pump unit, parts being broken away,

Figure 4 is a side elevation, partly in section, of the unit, observed in a plane at right 1926. I Serial No. 109,111.

angles to the plane upon which the Figure 3 is observed, parts being broken away,

Figure 5 is a section as seen on the line 5-715 of Figure 3, parts being eliminated, an

Figure 6 is a horizontal section as seen on the line 6-6 of Figure 3..

In describing the invention, I shall refer to the drawings in which similar reference characters designate corresponding parts throughout the several views and in which the numeral 1 designates a well within the depths of which there is a liquid 2, which is adapted to be removed through a pumping apparatus. Projected into this well is a tubing 3 of the usual character to which 15 adapted to be connected my improved pumping unit, the latter being described in detail herebelow.

This umping unitcomprises a substantially tu ular casing or housing 4 which is closed at its upper end and has threaded to the latter end a section 5 which is also tubular in design and in turn threaded into engagement with a head piece 6. The elements 4, 5 and 6 together comprise the unit which forms the basis of this ap lication and when secured together as described and shown constitute a unitary device.

The upper and lower ends respectively of the head piece 6 and the casing 4 are reduced in diameter and externally threaded so as to be readily connected with the well tubing. As shown in Figure 2, a union 7 is provided between the tubing 3 and the head member 6 within which is disposed a check valve (not shown). The lower threaded end of the member 4 is engaged with a pipe section 8 which is adapted to retain the unit at the proper height above the bottom of the well, as shown in Figure 20f the drawin s.

The head mem er 6 is preferably formed solid for the greater portion of its area but is provided at its upper end portion with an enlarged cavity 9 which forms what may be termed a collector basin for the reception of the liquid pumped from the well, said basin continuing through the upper end of said head member, as clearly shown in Figure 3 of the drawings.

Mounted within the intermediate section 5 is an electric motor 10, theshaft of which is designated by the numeral 11, the latter having a bearin 12 supported in the lower end ofthe hea member 6. This shaft 11.

projects through an opening in the upper end of the casing 4, bein supported in an additional bearing 13, an a packing box 14 is arranged in connection with said shaft and last mentioned bearing to prevent any possibility of the fluid from the well entering the housing of the motor.

Throu h the medium of a coupling 15, the shaft 11 is connected with a beveled gear 16, the latter in turn meshing with a second beveled gear 17 carried on a worm shaft 18. The ends ofthis shaft are rotatably supported in bearings 19 in the walls of the casin 4, as clearly shown in Figure 4 of the drawings and the worm portion of said shaft engages the teeth of a worm gear 20. Cranks 21 project from opposite faces of the gear 20 at points diametrically opposite one another and the outer ends of said cranks are rotatably supported in bearings 22 mounted in the walls of the casing 4, as clearly shown in Figure 3 of the drawings.

, Connected to the crank arms 21 and bearinged in the usual or any preferred manner are the connecting rods 23, which operate at their lower ends the pistons 24, the latter being received in diametrically opposed cylinders 25. These cylinders are formed in a block 26 which is provided adjacent the lower end of the casing 4 and disposed in a plane at right angles to the vertical plane of the cylinders 25 and in the upper portion of the block 26 are the diametrically opposite valve wells 27. These valve wells have connection with one another through the medium of a port 28 formed in the center of the block, as clearly shown in Figures 3, 4 and 5, permitting the fluid to flow from one of the wells to the other and making it possible to remove the fluid through one side of the unit in a manner to be hereinafter and more particularly described. Mounted within the wells or chambers 27 are the valve cages 29 which support the gravity ball valves 30. Connected with the upper ends of the cages 29, which together with the ball valves 30 form discharge valves for the device, are the discharge tubes or pipes 31 which project through an opening 32 in the front of the casing A and extend upwardl These discharge tubes or pipes connect t rough unions 33 with the head memher 6 so that the fluid passing through said tubes may be deposited into the collector basin 9, as appears obvious from the showing in the drawings.

Each cylinder 25 has connection with a valve well 27 through the medium of a port 34:, as clearly shown in Figure 6 of the drawings, whereby the liquid drawn within the cylinders may enter the discharge wells. At the lower end of each cylinder there is removably mounted a valve cage 35, similar in construction to the valve cages 29 previously described, and supported in each valve cage is a ball valve 36, as clearly shown in Figure 3 of the drawings. These cages 35 are constructed to fit into receiver ports which extend from the bottom of the cylinders to a chamber 37 formed in the lower end of the unit immediately adjacent the lower mouth portion thereof. A plurality of entrance openings 38 are provided in the wall of the casing 4 so that the fluid within the well may be readily admitted to the chamber 37, but it will be understood that other means may be provided for the admission of the fluid to said chamber.

As previously stated, an electric motor 10 is mounted within the detachable'unit section 5 and this 'motor may be as long as necessary in order to obtain the power required, it being of course understood that a difierent length section may be used where longer motors are provided. The section 5 being detachable makes it possible to use any size motor or motors removed for purposes of repair when necessary. The motor is preferably of the induction type, thus eliminatin the necessity of sparking commutators whic ordinarily cause trouble when operated in an entirely enclosed motor. The power cable which conducts the electric power to the motor is designated in the drawings by the numeral 39, said cable bein supported along the length of the well tu ing 3 by means of clamps or the like 40.

In operation, fluid in the well will enter the chamber 37 at the lower end of the unit through the medium of the openings 38 or otherwise as desired, and from the chamber, said fluid will be drawn intothe cylinders 25 through the valves 36, which are ravity valves and will close at the end of t e upstroke of the pistons. At the down-stroke of the pistons, the fluid will be forced through the ports 34 into the valve wells and through the discharge valves 30 in o the dischar e tubes 31. Thus the fluid is carried upward y through said tubes 31 and deposited into the collector basin 9 at the top of the unit from whence said fluid enters the well tubing and is conducted to the top of the well.

From the foregoing description of the construction of my improved device, the o eration thereof will be readily understoo and it will be seen that I have provided a simple, inexpensive and eflicient means for carryin out the objects of the invention.

ile I have particularly described the elements best adapted to perform the functions set forth, it is obvious that various changes in form, proportion and in the minor details of construction may be resorted to, without departing from the s irit or sacrificing any 0 the principles 0 the invention.

Having thus described my invention what I claim is:

1. A pumping unit comprising a casing casing and connected with the motor and having a piston slidably mounted in the block. and a pipe connected at one end with its lower end with a piston block having an,

the piston block and at its other end with the liquid receivin chamber, the intermediate rtion of sai pipe passin through the side wall of the casing an disposed exteriorly of the casing along the motor housing portion thereof.

2. A pumping unit comprising a casing having a closed upper end and provided at inlet opening and a well cavity, the upper end of said casin being provided with a liquid receivifig c amber, a motor housed in the upper portion of the casin a ump housed in the casing and connecte wit the motor and having a piston slidably mounted in the block and a pe connected at one end with the block an communicating with the well cavity thereof and connected at its other housing portion thereof.

end with the liquid receivin chamber, the intermediate ortion of sai pipe passin through the side of the casing and dispose exteriorly of the casing along the motor each other by a port passing through the partition, the upper end of said casinfi bemg provided wit her, a motor housed in the upper portion of the casing, a plump housed in the casing and connecte wit the motor and havin a iston slidably mounted in the piston 0 am er of the block, and a pi e connected at one end with the well cham er of the block and at its other end with the liquid receiving chamber, the intermediate portion of the pipe passing through the side of the casing and disposed exterior? along the motor housing portion thereo lntestimony whereof I aflix my si nature;

MELVIN L. MIL ON.

a liquid receiving 0 am- 

